Electric cut-out.



T. E. MURRAY.

ELECTRIC GUT-OUT APPLICATION HLM) 0012), 1910.

Patented Mar. 14, 1911.

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W/T/VESSFS @7, x. /f "74u if. VEL f i7 o L? T. E; MURRAY,

ELECTRIC CUT-OUT.

APPLICATION FILED ocuxz, w10.

Patented Mar. 14, 1911.

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T. E. MURRAY.

ELECTRIC' CUT-OUT. APPLICATION FILED M1225, 1910 `Patented Mar.14,1911.

3 SHEBTQ-SEEET 3 ease is preferably filled with cornininnted UNITEDsrnfrpsigrnnr onnion ELECTRIC CUT'UT.

986,744, Specification ot Letters Patent. Patented Mar.. 14, 1911.

Application tiled October 25, 1910. Serial No. 588,954. i

To all whom it may conce/m: parts, namely, the buse block A., the inse.Be it lrnownthat'l, THOMAS E. MURRAY, ease B, and the plete C which'supports the n citizen of the United States, residing at l fuse ease andalso forms :i @over for the New York, in the county of New York andblock, and which provided on its under Stzite'of New York, have inventeda certain side with live plngs'whieh respectively enter new and usefulImprovement in Eleetric suitable sockets insnid block. p Cnt-Onts, ofwhich the following is a, speer l The bloeit A is integinllir formed ofnor-- cation. T f eelein or other refractory insulating mn- Theinvention relates to electric ent-outs, l terial. "ltJ has four soolets,l),E, F, Gr. Fig'. and consists in the construct-ion hereinafter l 2,eeoli ol which communicates with en set forth, whereby the apparatus ismore lopening' in the end wall of the block. ln especnll)7 adapted toheavy enrrents. t seid sockets are metal bottoni plates il, l2, The fusecase is formed of sheet metal, 13, 14, which have prolongations 3GextendsuchI es iron or steel, and is mounted upon l ing throughtheopeningsin said end walls, the upper side of the Cover of the bn seblock, l Each plate has side portions bent niiiwerdly the said cover andbase block being of por to forni spring clips, ns shown at H. To eelninor similar refractory insulating inetlie bottoni plates ll and l). maybe conterial.. 0n the bott-oni ofthe cover :and neeted the terminals of'the positive con preferably integral therewith are plugs prodnetor of e,three wire system by means of vided with contacts which enter recessesin suitable clamping screws, es shown at l5. the base block andestablish circuit. through To the plntes 13 and lll, in like manner, maythe fuse or fuses which extend through. seid be connected the termina-lsof the negsitive of the block and beteren the tour sockets xninals of sthree wire system. The inse described is another socket l which @onimulplugs, @over and @use t0 the Conductor terconductor ot sind system. lnthe middleI l l 1 refractory insulating material, and ,may oonnicateswith n passage 'on the under kside tuin :i partition between the-fuses,so that O the blOCk, ill which ueplced two metall ezieb isproteeted frominjury by the bienvm Strips i7, i8, Fig. tl, the ends ot which are ing)of the other, bent np in seid socket to form clip arms J. lli theaccompanying drawings-Figure l. The strips iT and lil ere received in s.recess is n longitudinal section of niy improved lv On the lower sideoit the block andere out-Out 0n the line l, l of Fig. Fig. 2 en red inplnee by the conntersnnk bolts Ll, isn plan view, witthe fuse easerenioved, Fig. 3. 1 i-tlit thaese strps are inserttel, .a l j) r -3 2 QL s 1- and t1, Whole devn Fig 5 is a plan View 01; I Figs. Elend 5,which through the strips the bottom of the base block. Fig is t andenter the body of the bloclt. The ends cross section on the line 6,6 ofFig. l of the Strips 17 and '1,8 extend through T o. plan view of thetop of the bottoni openings in both end walls of the bloei; und of themetal :fuse ease. Fig. S is n plan View lare provided with screwconnections similar of the porcelain cover plete which enr-ries to l5,so that the terminals of the negative the plns pd intbelrprlisedbetwqeenthe inse l b It i t u t i l ense an` e ase oe Hq. is nn edge l tins eeonneeet o ie exreinities o son` view of said cover plate eiid plugs-inte-` strips. The covering plete C is also made ot' grally formedthereon, and Fi l0 is a, porcelain, and is provided with four plugs,cross section on the line l0, 10 o Fig. l. L, M., Q, B, (R not shown)which enter imiln 1nninbeirs und letters ot reference ,l d1 1- S V h the I, T in' lente ire "nr 1s. e n wnc en ers soo 'e ,iese The (levied)comprises three principal l plugs) arge formed integral with the'` plateC.

conductor of seid three wire system may respectively sockets D, E, F,Gr, and a niidinserted in On the bottom of eachplug as L, Fig. 1, is ametal contact plate 22 having two sides 19 bent up and secured byturning the extremities thereof into notches in the plug, and two sides23, also bent up and lying against the plug. Through each pair of plugs,as L, M, Fig. 1, extend the legs of a fuse strip. There are two of thesefuse strips,l N and O. As shown in Fig. 1, the end of the fuse strip Nis connected to the contact plate 22 and is arched over above the plateC, and its opposite end is connected to the similar contact plate ofplug M. The passages 9, Fig. 8, in the plugs through which the fusestrip N passes, are made somewhat larger in cross sectional area thansaid strip, and after the strip is inserted, these passages are to befilled with plaster or similar material.. The fuse O which isin theother pair of plugs is conneeted to them in the same way. The bent upportions 23 of the bottom plates extend nearly to the tops of the plugs,and enter the spring clip arms H when the plugs are place in the socketsD, E, F, G, I of block l On the upper side of the late C and directlyabove the four plugs M, Q, R, are four projections 24, 8, which enteropenings in the metal bottom plate 25 of the fuse case. Said plateisbent up on two -sides to form the semicircular side wallsI 26 and 27 ofthe fuse case, and on its two remaming sides 1t is langed for a shortdis'- tance upward, as shown at 28, 29. A middle partition 30 of thesame shape as the side walls divides the case into two compartments,into which enter respectively, the fuses N, O. The fuse case is closedby a semicylindrical cover 5 which is flanged over the semicircularsidewalls, asA shown at 7, Fig. 4E, and is secured by bolts enterin thefianges28. After the plugs are inserted in the sockets of the block, theplate C carrying the fuse case covers all of the sockets in said block.In order to clamp together the parts of the block, I provide a swingingbail 32, pivoted in lugs 33 secured on the upper surface of the block,which bail when turned down allows the fuse case and plug plate C to beremoved together,V

but which when turned up, as shown in Fig. 3, enables said fuse case andplate to be tightly held in the block by turning down the clamping screw34 which passes through t .e horizontal upper part of said bail.

The fuse case B is to be filled with any suitable comminuted refractorymaterial, in which the fuses become embedded.

In order to make close contact between the bottom plates on the plugsand the bottom plates 11,12, 13, 14 in the sockets, I form recesses inthe body of the block immediately below each socket, as shown in Figs. 1and 6, which recesses I may fill with any suitable cement Whilethecement is still plastic, the plates 11, 12, 13, 14 are pressed down uponit, so that when the cementsets the surface against which the platesrest closely fits them. The upper edges of the contacts H are bentoutwardly and sprung into recesses T in the .sides of the sockets, asshown in Fig. G. This enables said plat-es to be held in .said socketswithout the use of fastening bolts entering said sockets. In firstassembling the parts, the clamping screws 15 may be released, thusleaving the clips II free to turn slightly in the socket totitaccurately on the plugs, after which thescrews l5 are set up.

I claim:

l. An electric cut-out comprising a base block, a fuse case, adetachable cover for said block disposed between said block and saidcase, contacts respectively on said base and cover, and a fuse 1n saidcase connected to said cover contacts.

2. An electric cut-out comprising a base block, a cover therefor, a fusecase on the exterior of said cover, plugs on said cover entering socketsin said block, contacts on said plugs and in said sockets, and a fuseextending through said fuse case and plugs and connected to the contactson said plugs.

3. An electric cut-out .comprising a base block and a cover ofrefractory insulating material, a fuse case of metal having its bottomplate secured to said cover, plugs on said cover entering sockets insaid base block, contacts in said sockets and on said plu s, and a. fusestrip extending through sai fuse case and plugs and connected to thecontacts on said plugs.

4. An electric cut-out comprising a base block and a cover of refractoryinsulating material, a fuse case of metal having its bottom platesecured to said cover, projections on the upper side of said coverentering openings in said bottom plate, plugs on said cover enteringsockets in said base block, contacts in said sockets and on said plugs,and a fuse strip extending through said fuse case, projections andplugs, and connecte( to the contacts on said plugs.

5. An electric cut-out comprising a base block of non-conductingmaterial, a semi-cy lindrical fuse case of metal having its loot-Vtomwall secured to said cover, two pairs of plugs on said cover enteringsockets in said base block, and contacts in said sockets and on saidplugs; a fuse strip extending through said fusel case and to one of saidpairs of plugs and connected to said contacts on said .plugs,`a secondfuse strip extending through said fuse case and to the other of saidpairs of plugs and connected to said plugs; a' fifth plugon said coverentering a separate socket in said base, contact terminals in saidsocket, and a circuit closing contact plate on said fifth plug.

6. A base having a socket, a, bottom con. In testimony wheeof hav@afixed my tact plate having upwardly extending spring signature .inpresence of two wnesses. clip arms engaging in recesses formed in i l3,1, said. base, a prolon ation of said bottm THMA'S E *''JL'RE `plateextending outslde of said socket, and Witnesses:

means fm' detachbly securing said pro- GERTRUDE T. PORTER,

longati'ou to said hm, i MAY T. MCG'ARBY.

